1988 Harley Davidson Softail FXST
 

Where is the oil drain plug? I saw the hose from oil tank I drain it but where on engine do drain the oil ? Can't find oil plug..

Which oil drain plug, your bike has three oil reservoirs? If you are servicing your bike I recommend you get yourself a factory service manual, which will show you what you want and a whole lot more that you need to know. Your local dealer can supply - don't buy a cheap aftermarket one, get the real deal.

Drain Plug
 

Thank you, oil tank I drain from the hose to the frame. There's suppose to be oil drain plug, I think. I know where the primary and transmission plug is. I just trying to figure it out. I will buy a manual. Thanks

Oil drain
 

Think there only one resvior on the rt side?

The only way to drain engine oil is to drain the oil tank, there is no oil drain plug on the engine.